Analysis of tribo-charging during powder spreading in selective laser sintering: Assessment of polyamide 12 powder ageing effects on charging behavior

Hesse N, Dechet M, Gomez Bonilla JS, Lübbert C, Roth S, Bück A, Schmidt J, Peukert W (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Polymers MDPI

Book Volume: 11

Article Number: 609

Journal Issue: 4

DOI: 10.3390/polym11040609

Abstract

Powder flowability is key to achieving high process stability and part quality by application of smooth and dense layers in selective laser sintering (SLS). This study sheds light on the rarely investigated effect of tribo-electric charge build-up during powder delivery in the SLS process. This is achieved by a novel approach to quantify electrostatic potentials during doctor blading. The presented model setup is used in combination with charge spectrometry and impedance spectroscopy to investigate the alterations in tribo-electric charging behavior for the most commonly used laser sintering material polyamide 12 in its virgin and aged, c.f. reused, states. We show that the electrostatic charge build-up is significantly enhanced for aged polymer powder material, likely contributing to altered performance in SLS processing.

Authors with CRIS profile

Nicolas Hesse Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Maximilian Dechet Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Juan Sebastian Gomez Bonilla Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Christian Lübbert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Andreas Bück Professur für Partikeltechnik Jochen Schmidt Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

Related research project(s)

Production of functional polymer particles via liquid-based top-down processes (A1) (SFB 814 (A1)) CRC 814 - Additive Manufacturing (SFB 814) July 1, 2011 - June 30, 2023 Quality assurance system for powders used in selective laser beam melting of polymers (T1) (SFB 814 (T1)) CRC 814 - Additive Manufacturing (SFB 814) July 1, 2017 - Dec. 31, 2020

How to cite

APA:

Hesse, N., Dechet, M., Gomez Bonilla, J.S., Lübbert, C., Roth, S., Bück, A.,... Peukert, W. (2019). Analysis of tribo-charging during powder spreading in selective laser sintering: Assessment of polyamide 12 powder ageing effects on charging behavior. Polymers, 11(4). https://doi.org/10.3390/polym11040609

MLA:

Hesse, Nicolas, et al. "Analysis of tribo-charging during powder spreading in selective laser sintering: Assessment of polyamide 12 powder ageing effects on charging behavior." Polymers 11.4 (2019).

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